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MBBS QUESTION #10192
Question 1
After birth, functional and later anatomical closure of the fetal ductus arteriosus results in formation of the:
  • Ligamentum teres
  • Ligamentum arteriosum✔️
  • Fossa ovalis
  • Median umbilical ligament
Correct Answer Explanation
The ligamentum arteriosum is the fibrous remnant of the ductus arteriosus, which in fetal life shunted blood from the pulmonary trunk to the aorta, bypassing the non-aerated lungs; its persistence beyond infancy (patent ductus arteriosus) is an important congenital cardiac anomaly.